Sikaflex

Discussion in 'Solar Power' started by HobbyHarvey, Jun 6, 2018.

  1. HobbyHarvey

    HobbyHarvey Funster

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    Morning all, which sikaflex is recommended for bonding solar panel mounts to the motorhome roof, looking at either291i or 292i.
    Also what is the recommended surface preparation for a GRP roof
    Many thanks
    Mike
     
  2. Richard and Ann

    Richard and Ann Funster

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    Think I used sikaflex 512 (there was a pic of a caravan on it anyway)
    I wiped the roof with meths and then screwed down through the lot. My roof is aluminium skin though.
     
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  3. Speve

    Speve Funster

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    I wouldn’t screw down through the roof the less holes the better I have found Stixall to be very good and cheaper than Sikaflex.(y)(y)(y)
     
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  4. scotjimland

    scotjimland Funster Life Member

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    Neither ..


    This is the instructions from Alden

    I followed them to fix an Alden AS4 auto dish , a lot heaver than a solar panel.. no problems

    Sika 252 for fixing sat dish or solar panels.


    Glueing the external unit



    1. Use a pencil to mark the place of the unit on the roof.
    2. Sand the roof surface with sandpaper.
    3. Clean each surface with a thinner.
    4. Spread Sika-Aktivator on the sanded surface.
      Leave to dry for 15 to 20 minutes.
    5. Glue generously the base of the unit with SikaFlex 252 then press slightly on the unit. Layer of glue: ± 3 mm.


    1. To accelerate the polymerisation, spray a little water on the visible parts of the glue.
    Leave to dry for 24 hours.
     
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  5. Richard and Ann

    Richard and Ann Funster

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    I'm not saying they're wrong, but why is there a picture of a motorhome on Sikaflex 512?

    Perhaps it's for sealing windows or something else :eek: anyway it's immovable now it's cured.

    Screenshot_20180606-111115.png
     
  6. Richard and Ann

    Richard and Ann Funster

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    Googling further... I think they're mostly the same product with a few different additives in.
     
  7. scotjimland

    scotjimland Funster Life Member

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    the photo of a motorhome doesn't tell you what it's specific application is ,
    each Sika product has a different application.. adhesive, sealer, marine, etc..

    Alden supply Sika 252 + Akitvator and Instructions with the auto dish kit.

    my dish has been on three years, and was still there when I sold the van
     
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  8. Ianm18

    Ianm18 Funster

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    Mike

    I just completed the fitment of another’s solar panel and I used 512 no problems
     
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  9. TinaL

    TinaL Funster

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    Nearly ready to fit my solar panels and cable entry box to our new moho.
    I have the Sikaflex 512 but dont have the activator/cleaning stuff. Is it really needed?, from what I have read thus far on here, provided that I prepare the surface with some wet & dry where the brackets are being located, wipe clean ect, then the stuff sticks like you know what to a blanket.
    Am I wrong?, I sure wont be screwing the brackets to the roof though, too scared on that one :eek:
    Les
     
  10. Silver-Fox

    Silver-Fox Funster

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    Personally I would use panel wipe for cleaning any area to take adhesive.
    It doesn't leave any kind of residue behind.
     
  11. TinaL

    TinaL Funster

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    Thanks for that, can you give me an idea of what "panel Wipes" you are referring to.
    I have screen wipes but I guess you are thinking of something different, Just wish I still had my aerosol can of Switch Cleaner, that cleaned everything in the old days.

    Les
     
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  12. Silver-Fox

    Silver-Fox Funster

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    It might be worth going to a local body repair shop with a small container and ask if you can have a splash of panel wipe. Bung them a couple of quid for a coffee and jobs a good un.
    Its the fluid they use prior to painting so you cant afford to leave any chemicals on the panels.

    Shame your not closer as I tend to buy it in 5l cans when I'm doing a car polish.

    Or buy switch cleaner as you say :)
     
  13. Simon Richardson

    Simon Richardson Funster

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    I used 512 for my Dish as per Maxviews instructions. It's that sticky you could clean your roof with a Baby Wipe and it would still stick! (y)
     
  14. TinaL

    TinaL Funster

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    Thanks Guys for the advice.
    Les
     
  15. tonyidle

    tonyidle Funster

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    Switch cleaner (most varieties) contains corrosion inhibitors and lubricant. I wouldn't advise using it to degrease / de-wax.
     
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  16. andy63

    andy63 Funster

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    If you dont have panel wipe as mentioned already , then i find a final wipe down with meths cleans the area up well enough..
    On the sikaflex question... again i find any of the brands of pu adhesive /sealant does the job just as well , often at a fraction of the price of sikaflex
    Andy
     
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  17. Lenny HB

    Lenny HB Funster

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    I always use 291i for solar panels and 292i for sat dishes.
     
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  18. Silver-Fox

    Silver-Fox Funster

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    I stand corrected.
    Back to my original suggestion then, panel wipe (y)
     
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  19. TinaL

    TinaL Funster

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    Thanks again Guys jobs a good un.
    Halfords do packs of panel wipes for £1.40:)
    Les
     
  20. romany

    romany Funster

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    Another vote for Stixall here used it to stick an awning rail to the bottom of my fiama awning (easier for drive away awning) and that is still holding two years later despite having the awning up during some fairly strong winds.
     

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